linux-kernel - Re: [tip:x86/urgent] x86/uv: fix init of memory-less nodes

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Message-ID: <alpine.DEB.2.00.0904171129310.16240@chino.kir.corp.google.com>
Date:	Fri, 17 Apr 2009 11:31:53 -0700 (PDT)
From:	David Rientjes <rientjes@...gle.com>
To:	mingo@...hat.com, hpa@...or.com, linux-kernel@...r.kernel.org,
	steiner@....com, tglx@...utronix.de, mingo@...e.hu
cc:	linux-tip-commits@...r.kernel.org
Subject: Re: [tip:x86/urgent] x86/uv: fix init of memory-less nodes

On Fri, 17 Apr 2009, tip-bot for Jack Steiner wrote:

> Commit-ID:  28468050e2f5410c04fd737c922f2bea73ddd690
> Gitweb:     http://git.kernel.org/tip/28468050e2f5410c04fd737c922f2bea73ddd690
> Author:     Jack Steiner <steiner@....com>
> AuthorDate: Fri, 17 Apr 2009 09:22:42 -0500
> Committer:  Ingo Molnar <mingo@...e.hu>
> CommitDate: Fri, 17 Apr 2009 16:45:29 +0200
> 
> x86/uv: fix init of memory-less nodes
> 
> Add support for nodes that have cpus but no memory.
> The current code was failing to add these nodes
> to the nodes_present_map.
> 
> [ Impact: fix potential boot crash on memory-less UV nodes. ]
> 

This is incomplete, x2apic maps cpus to pxms with a type 2 srat entry and 
that pxm may not have affinity to any type 1 memory structure.
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